Slide percussion tool



Oct. 23, 1951 G. J. MOELLER 2,572,370

SLIDE PERCUSSION .TOOL

Filed March 29, 1947 7\ Z2 W 29 17 I J] 4 Z4 Z6 Z8 Z3 6, Z5

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attorney Patented Oct. 23, 1951 SLIDE PERCUSSION TOOL George J. Moeller, Altadena, Cali assignor to Anthony Oberholtz, Los Angeles, Calif.

Application March 29, 1947,, SerialNo. 738,121

"Claims. (01. 81-5235) This invention relates to a slide percussion tool and deals more specifically with a tool for performing pulling, driving or rotating operations, as desired.

Prior tools of the character indicated are conventionally provided withan external stop, usually in the form of an enlargement on the shank of the tool. This stop is hazardous in that the hand of the operator is frequently pinched between it and the slide handle or hammer grasped by said hand.

Accordingly, this invention has for an object to provide a percussion tool, as indicated in which the stops or movement limiting abutments are completely enclosed within the operating handle and the tool, thereby, rendered safe in operation.

Another object of the invention is to provide a slide percussion tool which is equally efiective for driving operations, for pulling operations and for rotating operations, the tool beingsodesigned that said operations may be selectively accomplished without change in the tool assembly.

My invention also has for its objects to. provide such means that are positive in operation, convenient in use, easily installed in a working position and easily disconnected therefrom, economical of manufacture, relatively simple, and of general superiority and serviceability.

The invention also comprises novel details of construction and novel combinations and arrangements of parts, which will morefully appear in the course of the following description. How.- ever, the drawings merely show and the following description merely describes one embodiment of the present invention, which is given by way of illustration or example only.

In the drawings, like reference characters designate similar parts in the several views.

Fig. 1 is an upper end view of the slide percussion tool contemplated in the present invention.

Fig. 2 is a longitudinal sectional view thereof, partly in elevation.

Fig. 3 is a cross-sectional view as taken on the line 33 of Fig. 2.

Fig. 4 is a bottom end view.

The tool which is illustrated comprises three essential elements, namely; a stem or shank 5, a handle or hammer 6, and a stop collar 1 fitted to the hammer 6 and maintaining the tool in assembly.

The stem 5 comprises a suitable turning or forging which is integrally formed with a lower extension 8, an intermediate boss or enlargement 9, and an upper extension [0. The extensions 8 and III are preferably co-axial and, although shown cylindrical, may be of any desired shape. The boss is formed'as an annular flange larger than the extension and said flange, at one .side, is removed to provide a flat II. The lower end of the extension 8 is provided with a screw seat [2 or the equivalent thereof, for a suitable interchangeable element [3 according to theoperation desired to be accomplished. Such an element may be formed as a driver, or pusher, a.

puller, such as a valve puller, or a turner, orv rotator, such as a spanner, screw driver, etc.

The handle or hammer 6 comprises a sleevelike member having a hand-grasping cylindrical part 14 which is preferably knurled as at l5 and formed, at its upper end, with an annular vflange It. At said upper end, the hammer is provided with an axial internal thread I! for the collar; 1. Therebelow, a passage I8 is formed in the hammer, said passage extending from the threads l1 toa shoulder l9 at the opposite end of the ham-. mer. The cross-sectional shape of passage I 8 is similar to the shape of flange 9, being circular to accommodate said flange and havinga flat sideZfl to guidethe fiat II. It is evident, by this arrangement, that the stem and hammer are in non-rotational association, the extension l0 and flange 9 residing within the passage IS. The passage [8 .is extended beyond theshoulder 18 as a circular opening 2] through which the stem extension 8 extends.

The collar 1 is externally threaded for engagement with the internal threads I! and said collar has-an axial passage 22 of generally the diameter. of the opening 2| for free movement therethrough of the upper stem extension 10. The

thickened part 23 of the hammer serves as a shoulder 24 for the collar, as best seen in .Fig. .2..

The spanner slots 25 provide means wherebysaid collar may be tightened against shoulder or be removed. The bottom edge 26 of the collar is opposite to the shoulder 19 and both the shoulder l9 and said edge 26 serve as movement-limiting abutments for the stem by engaging enlarged:

but oppositely, by applying a pulling element to the tool and moving the hammer to bring the abutment [9 into sharp percussive engagement with flange 9, a lifting or pulling operation is performed. It is evident that the keying non-rotational engagement on the flat-sided flange 9 in the flat-sided passage l8 will result in a rotative movement of the stem and of an element applied thereto, upon a rotative movement of the hammer 6.

Having the hand partly resting on the hammer 6 and partly on the stem 8 can result in no harm in the present tool, since the shank extension 8 is smooth and without projectors which, in prior tools, often painfully pinched the portion of the hand resting on the stem.

It is to be understood that spline or key means may be employed instead of the flat faces I l and 20. However, such fiat faces are preferred, since they make assembling easier and provide a stronger tool. Both the fiat faces and the spline or key means are called keying means in the hereunto appended claims.

' While I have illustrated and described what I now regard as the preferred embodiment of my invention, the construction is, of course, subject to modifications without departing from the spirit and scope of my invention. I therefore, do not wish to restrict myself to the particular form of construction illustrated and described, but desire to avail myself of all modifications that may fall within the scope of the appended claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. A slide percussion tool comprising an elongated stem having a flat-sided flange intermediate its ends, a sleeve member having a flatsided axial passage for axial movement therein of, said flange, an integral abutment for said flange at one end of the sleeve member and defining one end of said flat-sided axial passage, and a collar carried by the end of the sleeve member opposite said abutment and having an end wall comprising an opposite abutment for said flange, said end wall of said sleeve member defining the opposite end of the flat-sided passage.

2. A slide percussion tool comprising an elongated stem having a flat-sided flange intermediate its ends, a sleeve member having a flat-sided axial passage for axial movement therein of said flange, an integral abutment for said flange at one end of the sleeve member and defining one end of said flat-sided axial passage, and a collar threadedly carried by the end of the sleeve member opposite said abutment and having a cylindrical axial passage forming an extension of the passage in the sleeve member and adapted to guide said stem, said collar having an end wall comprising an opposite abutment for said flange of the stem and defining the opposite end of the flat-sided axial passage.

3. In a percussion tool, an operating sleeve having opposed internal and spaced end abut- 4 ments and having an axial passage therethrough, said passage between the abutments having at least one flat longitudinal side terminating at each end at the abutments, and a stem extending through said passage and formed with an integral intermediate flange shaped to slidingly fit the passage and the flat side thereof and movable between said abutments.

4. In a percussion tool, an operating sleeve having opposed internal and spaced end abutments and having an axial passage therethrough, said passage between the abutments having at least one flat longitudinal side terminating at each end at the abutments, one of said abutments being integrally formed on the sleeve and the other being removably connected thereto and a stem extending through said passage and formed with an integral intermediate flange '7 shaped to slidingly fit the passage and the flat I ing in the other end, said element having a cylindrical passage larger than the circular opening to define an internal abutment shoulder adjacent one end of said element, said passage being smaller than the internally threaded opening, a collar threadedly engaged in the threaded opening and having a circular opening therein, said collar having an inner end wall defining an internal abutment shoulder opposite to the mentioned abutment shoulder, said cylindrical passage having at least one fiat side that extends from abutment to abutment and is substantially tangent to the two circular openings, there being an outwardly directed shoulder at the end of said flat side that comprises a locating shoulder for said collar, and a stem extending freely axially through the hand-grasping element and having a flange intermediate its end, said flange having a flat-sided cylindrical form to accord with the form of the passage to hold the stem non-rotationally in the hand-grasping element during movement of said flange between abutments.

GEORGE J. MOELLER.

REFERENCES CITED The following references are of record in the file of this patent:'

UNITED STATES PATENTS mini. 2..., 

